n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
281: | \[281!!!!-1\] | 22 × 571 × 152077 × 312311284982693099<18> × 492239540790685244084717241136129128839086426212012855676425627258881240366878269550841622144383734175821763058446557<117> |